7(2p-1)=21

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Solution for 7(2p-1)=21 equation: 



7(2p-1)=21

We move all terms to the left:

7(2p-1)-(21)=0

We multiply parentheses

14p-7-21=0

We add all the numbers together, and all the variables

14p-28=0

We move all terms containing p to the left, all other terms to the right

14p=28

p=28/14

p=2

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